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| Pushing the button turns off overdrive, causing your vehicle to cruise at higher RPMs and shift less when going up or down hills or accelerating. That's probably an awful explanation and someone that's more vehicle-savvy will be able to explain that better, but suffice it to say in the long run it will wear less on your transmission, but in the short-term your fuel mileage will suffer because you're running at higher RPMs more.
Personally, when anything is attached to my trailer hitch I turn overdrive off. If you're pulling a little 12' aluminum with a Ram 2500 (even a 1500) or similar I wouldn't be too concerned about turning overdrive off. If you can lift the tongue of the boat onto the trailer hitch without breaking your back you probably don't have to have overdrive off, especially if you aren't trailering long distances or planning to get out an absurd amount. | |
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